Iron ‘Cupferrate

Wash down the sides of the two filter papers into the roundbottom flask with as little chloroform as possible to remove traces of red-brown iron-cupferrate. Distill off the chloroform until about 20 ml is left and remove the remainder of chloroform by gentle blowing or suction, as shown in Fig. 59. 

In chelation complexes (sometimes called inner complexes when uncharged) the central metal ion coordinates with a polyfunctional organic base to form a stable ring compound, e.g. copper(II) acetylacetonate or iron(III) cupferrate ... 

Example 2 Iron (III) cupferrate gives rise to a stable ring compounds as shown below ... 

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